$(".nav-tab").mouseover(function(){
 	$(this).children().not("a").css("display","block");
});
$(".nav-tab").mouseout(function(){
 	$(this).children().not("a").css("display","none");
});
$(".side-user").mouseover(function(){
 	$(".user-menu").css("display","block");
});
$(".side-user").mouseout(function(){
 	$(".user-menu").css("display","none");
});
$(window).scroll( function() {
  console.log($(this).scrollTop());
  if ($(this).scrollTop()>=70) {
    $(".header_warp").css("display","none");
    $(".fixed-header").css("display","block");
  }else{
    $(".fixed-header").css("display","none");
    $(".header_warp").css("display","block");
  }
 } );
